郑德才博客

前端页面代码：

<div>
    <asp:Button ID="sBtn6" runat="server" OnClick="sBtn6_Click" Text="ZIP压缩" />&nbsp;
    <asp:Button ID="sBtn7" runat="server" OnClick="sBtn7_Click" Text="ZIP解压缩" /></div>

使用C#实例：

/// <summary>
/// ZIP压缩
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void sBtn6_Click(object sender, EventArgs e)
{
    urlPath = Server.MapPath("~/file/");
    string zStr = GZipHelper.Compress("zhengdecai.com");
    byte[] deskey = { 198, 125, 20, 111, 77, 71, 228, 9 };
    //GZipHelper.Compress(deskey);
    GZipHelper.CompressFile(urlPath + "zhengdecai_bar.jpg", urlPath + "zhengdecai.zip");
    GZipHelper.PackFiles(urlPath + "zhengdecai_bar.zip", urlPath + "zip/");
    //GZipHelper.ZipFileDictory(urlPath + "zip/", urlPath, 5);
    GZipHelper.ZipFile(urlPath + "zhengdecai_bar.jpg", urlPath + "zheng_b.zip", 5);
    GZipHelper.Zip(urlPath + "zhengdecai_bar.jpg", urlPath + "zheng_c.zip", 5);
    GZipHelper gZipHelper = new GZipHelper();
    //gZipHelper.EnZip("zhengdecai_bar.jpg", urlPath, urlPath);
}
/// <summary>
/// ZIP解压缩
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
protected void sBtn7_Click(object sender, EventArgs e)
{
    urlPath = Server.MapPath("~/file/");
    string zStr = GZipHelper.Compress("zhengdecai.com");
    string cStr = GZipHelper.Uncompress(zStr);
    GZipHelper.DecompressFile(urlPath + "zhengdecai.zip", urlPath + "zhengdecai_bar.jpg");
    GZipHelper.UnpackFiles(urlPath + "zhengdecai_bar.zip", urlPath + "zip/");
    GZipHelper.UnZip(urlPath + "zheng_c.zip", urlPath);
}

类库信息：

/// <summary>
/// 压缩文本、字节或者文件的压缩辅助类
/// </summary>
public class GZipHelper
{
    #region 文本字符串、文件压缩操作
    /// <summary>
    /// 压缩字符串
    /// </summary>
    /// <param name="text">需要压缩文本内容</param>
    /// <returns></returns>
    public static string Compress(string text)
    {
        // convert text to bytes
        byte[] buffer = Encoding.UTF8.GetBytes(text);
        // get a stream
        MemoryStream ms = new MemoryStream();
        // get ready to zip up our stream
        using (GZipStream zip = new GZipStream(ms, CompressionMode.Compress, true))
        {
            // compress the data into our buffer
            zip.Write(buffer, 0, buffer.Length);
        }
        // reset our position in compressed stream to the start
        ms.Position = 0;
        // get the compressed data
        byte[] compressed = ms.ToArray();
        ms.Read(compressed, 0, compressed.Length);
        // prepare final data with header that indicates length
        byte[] gzBuffer = new byte[compressed.Length + 4];
        //copy compressed data 4 bytes from start of final header
        System.Buffer.BlockCopy(compressed, 0, gzBuffer, 4, compressed.Length);
        // copy header to first 4 bytes
        System.Buffer.BlockCopy(BitConverter.GetBytes(buffer.Length), 0, gzBuffer, 0, 4);
        // convert back to string and return
        return Convert.ToBase64String(gzBuffer);
    }
    /// <summary>
    /// 解压字符串
    /// </summary>
    /// <param name="compressedText">需解压的文本字符串</param>
    /// <returns></returns>
    public static string Uncompress(string compressedText)
    {
        // get string as bytes
        byte[] gzBuffer = Convert.FromBase64String(compressedText);
        // prepare stream to do uncompression
        MemoryStream ms = new MemoryStream();
        // get the length of compressed data
        int msgLength = BitConverter.ToInt32(gzBuffer, 0);
        // uncompress everything besides the header
        ms.Write(gzBuffer, 4, gzBuffer.Length - 4);
        // prepare final buffer for just uncompressed data
        byte[] buffer = new byte[msgLength];
        // reset our position in stream since we're starting over
        ms.Position = 0;
        // unzip the data through stream
        GZipStream zip = new GZipStream(ms, CompressionMode.Decompress);
        // do the unzip
        zip.Read(buffer, 0, buffer.Length);
        // convert back to string and return
        return Encoding.UTF8.GetString(buffer);
    }
    /// <summary>
    /// 将字符流进行压缩
    /// </summary>
    /// <typeparam name="T">压缩实体格式</typeparam>
    /// <param name="stream">字符流</param>
    /// <param name="mode">压缩类型</param>
    /// <returns></returns>
    public static T GZip<T>(Stream stream, CompressionMode mode) where T : Stream
    {
        byte[] writeData = new byte[4096];
        T ms = default(T);
        using (Stream sg = new GZipStream(stream, mode))
        {
            while (true)
            {
                Array.Clear(writeData, 0, writeData.Length);
                int size = sg.Read(writeData, 0, writeData.Length);
                if (size > 0)
                {
                    ms.Write(writeData, 0, size);
                }
                else
                {
                    break;
                }
            }
            return ms;
        }
    }
    /// <summary>
    /// 压缩字节
    /// </summary>
    /// <param name="bytData">字符串数组</param>
    /// <returns></returns>
    public static byte[] Compress(byte[] bytData)
    {
        using (MemoryStream stream = GZip<MemoryStream>(new MemoryStream(bytData), CompressionMode.Compress))
        {
            return stream.ToArray();
        }
    }
    /// <summary>
    /// 解压字节
    /// </summary>
    /// <param name="bytData">字符串数组</param>
    /// <returns></returns>
    public static byte[] Decompress(byte[] bytData)
    {
        using (MemoryStream stream = GZip<MemoryStream>(new MemoryStream(bytData), CompressionMode.Decompress))
        {
            return stream.ToArray();
        }
    }
    /// <summary>
    /// 压缩文件
    /// </summary>
    /// <param name="sourceFile">源文件</param>
    /// <param name="destinationFile">目标文件</param>
    public static void CompressFile(string sourceFile, string destinationFile)
    {
        if (File.Exists(sourceFile) == false) //判断文件是否存在
            throw new FileNotFoundException();
        if (File.Exists(destinationFile) == false) //判断目标文件文件是否存在
            FileHelper.DeleteFile(destinationFile);
        //创建文件流和字节数组
        byte[] buffer = null;
        FileStream sourceStream = null;
        FileStream destinationStream = null;
        GZipStream compressedStream = null;
        try
        {
            sourceStream = new FileStream(sourceFile, FileMode.Open, FileAccess.Read, FileShare.Read);
            buffer = new byte[sourceStream.Length];
            //把文件流存放到字节数组中
            int checkCounter = sourceStream.Read(buffer, 0, buffer.Length);
            if (checkCounter != buffer.Length)
            {
                throw new ApplicationException();
            }
            destinationStream = new FileStream(destinationFile, FileMode.OpenOrCreate, FileAccess.Write);
            //创建GzipStream实例,写入压缩的文件流
            compressedStream = new GZipStream(destinationStream, CompressionMode.Compress, true);
            compressedStream.Write(buffer, 0, buffer.Length);
        }
        finally
        {
            // Make sure we allways close all streams
            if (sourceStream != null)
            { sourceStream.Close(); }
            if (compressedStream != null)
            { compressedStream.Close(); }
            if (destinationStream != null)
            { destinationStream.Close(); }
        }
    }
    /// <summary>
    /// 解压文件
    /// </summary>
    /// <param name="sourceFile">源文件</param>
    /// <param name="destinationFile">目标文件</param>
    public static void DecompressFile(string sourceFile, string destinationFile)
    {
        if (!File.Exists(sourceFile))
        {
            throw new FileNotFoundException();
        }
        FileStream stream = null;
        FileStream stream2 = null;
        GZipStream stream3 = null;
        byte[] buffer = null;
        try
        {
            stream = new FileStream(sourceFile, FileMode.Open);
            stream3 = new GZipStream(stream, CompressionMode.Decompress, true);
            buffer = new byte[4];
            int num = ((int)stream.Length) - 4;
            stream.Position = num;
            stream.Read(buffer, 0, 4);
            stream.Position = 0L;
            byte[] buffer2 = new byte[BitConverter.ToInt32(buffer, 0) + 100];
            int offset = 0;
            int count = 0;
            while (true)
            {
                int num5 = stream3.Read(buffer2, offset, 100);
                if (num5 == 0)
                {
                    break;
                }
                offset += num5;
                count += num5;
            }
            stream2 = new FileStream(destinationFile, FileMode.Create);
            stream2.Write(buffer2, 0, count);
            stream2.Flush();
        }
        finally
        {
            if (stream != null)
            {
                stream.Close();
            }
            if (stream3 != null)
            {
                stream3.Close();
            }
            if (stream2 != null)
            {
                stream2.Close();
            }
        }
    }
    #endregion
    #region ICSharpCode.SharpZipLib、RAR压缩、解压文件
    #region ICSharpCode.SharpZipLib普通解压缩
    /// <summary>
    /// 压缩
    /// </summary> 
    /// <param name="filename"> 压缩后的文件名(包含物理路径)</param>
    /// <param name="directory">待压缩的文件夹(包含物理路径)</param>
    public static void PackFiles(string filename, string directory)
    {
        try
        {
            FastZip fz = new FastZip();
            fz.CreateEmptyDirectories = true;
            fz.CreateZip(filename, directory, true, "");
            fz = null;
        }
        catch (Exception)
        {
            throw;
        }
    }
    /// <summary>
    /// 解压缩
    /// </summary>
    /// <param name="file">待解压文件名(包含物理路径)</param>
    /// <param name="dir"> 解压到哪个目录中(包含物理路径)</param>
    public static bool UnpackFiles(string file, string dir)
    {
        try
        {
            if (!Directory.Exists(dir))
            {
                Directory.CreateDirectory(dir);
            }
            ZipInputStream s = new ZipInputStream(File.OpenRead(file));
            ZipEntry theEntry;
            while ((theEntry = s.GetNextEntry()) != null)
            {
                string directoryName = Path.GetDirectoryName(theEntry.Name);
                string fileName = Path.GetFileName(theEntry.Name);
                if (directoryName != String.Empty)
                {
                    Directory.CreateDirectory(dir + directoryName);
                }
                if (fileName != String.Empty)
                {
                    FileStream streamWriter = File.Create(dir + theEntry.Name);
                    int size = 2048;
                    byte[] data = new byte[2048];
                    while (true)
                    {
                        size = s.Read(data, 0, data.Length);
                        if (size > 0)
                        {
                            streamWriter.Write(data, 0, size);
                        }
                        else
                        {
                            break;
                        }
                    }
                    streamWriter.Close();
                }
            }
            s.Close();
            return true;
        }
        catch (Exception)
        {
            throw;
        }
    }
    #endregion
    #region 私有方法
    /// <summary>
    /// 递归压缩文件夹方法
    /// </summary>
    public static bool ZipFileDictory(string FolderToZip, ZipOutputStream s, string ParentFolderName)
    {
        bool res = true;
        string[] folders, filenames;
        ZipEntry entry = null;
        FileStream fs = null;
        Crc32 crc = new Crc32();
        try
        {
            entry = new ZipEntry(Path.Combine(ParentFolderName, Path.GetFileName(FolderToZip) + "/"));
            s.PutNextEntry(entry);
            s.Flush();
            filenames = Directory.GetFiles(FolderToZip);
            foreach (string file in filenames)
            {
                fs = File.OpenRead(file);
                byte[] buffer = new byte[fs.Length];
                fs.Read(buffer, 0, buffer.Length);
                entry = new ZipEntry(Path.Combine(ParentFolderName, Path.GetFileName(FolderToZip) + "/" + Path.GetFileName(file)));
                entry.DateTime = DateTime.Now;
                entry.Size = fs.Length;
                fs.Close();
                crc.Reset();
                crc.Update(buffer);
                entry.Crc = crc.Value;
                s.PutNextEntry(entry);
                s.Write(buffer, 0, buffer.Length);
            }
        }
        catch
        {
            res = false;
        }
        finally
        {
            if (fs != null)
            {
                fs.Close();
                fs = null;
            }
            if (entry != null)
            {
                entry = null;
            }
            GC.Collect();
            GC.Collect(1);
        }
        folders = Directory.GetDirectories(FolderToZip);
        foreach (string folder in folders)
        {
            if (!ZipFileDictory(folder, s, Path.Combine(ParentFolderName, Path.GetFileName(FolderToZip))))
            {
                return false;
            }
        }
        return res;
    }
    /// <summary>
    /// 压缩目录
    /// </summary>
    /// <param name="FolderToZip">待压缩的文件夹，全路径格式</param>
    /// <param name="ZipedFile">压缩后的文件名，全路径格式</param>
    public static bool ZipFileDictory(string FolderToZip, string ZipedFile, int level)
    {
        bool res;
        if (!Directory.Exists(FolderToZip))
        {
            return false;
        }
        ZipOutputStream s = new ZipOutputStream(File.Create(ZipedFile));
        s.SetLevel(level);
        res = ZipFileDictory(FolderToZip, s, "");
        s.Finish();
        s.Close();
        return res;
    }
    /// <summary>
    /// 压缩文件
    /// </summary>
    /// <param name="FileToZip">要进行压缩的文件名</param>
    /// <param name="ZipedFile">压缩后生成的压缩文件名</param>
    public static bool ZipFile(string FileToZip, string ZipedFile, int level)
    {
        if (!File.Exists(FileToZip))
        {
            throw new System.IO.FileNotFoundException("指定要压缩的文件: " + FileToZip + " 不存在!");
        }
        FileStream ZipFile = null;
        ZipOutputStream ZipStream = null;
        ZipEntry ZipEntry = null;
        bool res = true;
        try
        {
            ZipFile = File.OpenRead(FileToZip);
            byte[] buffer = new byte[ZipFile.Length];
            ZipFile.Read(buffer, 0, buffer.Length);
            ZipFile.Close();
            ZipFile = File.Create(ZipedFile);
            ZipStream = new ZipOutputStream(ZipFile);
            ZipEntry = new ZipEntry(Path.GetFileName(FileToZip));
            ZipStream.PutNextEntry(ZipEntry);
            ZipStream.SetLevel(level);
            ZipStream.Write(buffer, 0, buffer.Length);
        }
        catch
        {
            res = false;
        }
        finally
        {
            if (ZipEntry != null)
            {
                ZipEntry = null;
            }
            if (ZipStream != null)
            {
                ZipStream.Finish();
                ZipStream.Close();
            }
            if (ZipFile != null)
            {
                ZipFile.Close();
                ZipFile = null;
            }
            GC.Collect();
            GC.Collect(1);
        }
        return res;
    }
    #endregion
    #region ICSharpCode.SharpZipLib开始压缩、解压
    /// <summary>
    /// 压缩
    /// </summary>
    /// <param name="FileToZip">待压缩的文件目录</param>
    /// <param name="ZipedFile">生成的目标文件</param>
    /// <param name="level">6</param>
    public static bool Zip(String FileToZip, String ZipedFile, int level)
    {
        if (Directory.Exists(FileToZip))
        {
            return ZipFileDictory(FileToZip, ZipedFile, level);
        }
        else if (File.Exists(FileToZip))
        {
            return ZipFile(FileToZip, ZipedFile, level);
        }
        else
        {
            return false;
        }
    }
    /// <summary>
    /// 解压
    /// </summary>
    /// <param name="FileToUpZip">待解压的文件</param>
    /// <param name="ZipedFolder">解压目标存放目录</param>
    public static void UnZip(string FileToUpZip, string ZipedFolder)
    {
        if (!File.Exists(FileToUpZip))
        {
            return;
        }
        if (!Directory.Exists(ZipedFolder))
        {
            Directory.CreateDirectory(ZipedFolder);
        }
        ZipInputStream s = null;
        ZipEntry theEntry = null;
        string fileName;
        FileStream streamWriter = null;
        try
        {
            s = new ZipInputStream(File.OpenRead(FileToUpZip));
            while ((theEntry = s.GetNextEntry()) != null)
            {
                if (theEntry.Name != String.Empty)
                {
                    fileName = Path.Combine(ZipedFolder, theEntry.Name);
                    if (fileName.EndsWith("/") || fileName.EndsWith("\\"))
                    {
                        Directory.CreateDirectory(fileName);
                        continue;
                    }
                    streamWriter = File.Create(fileName);
                    int size = 2048;
                    byte[] data = new byte[2048];
                    while (true)
                    {
                        size = s.Read(data, 0, data.Length);
                        if (size > 0)
                        {
                            streamWriter.Write(data, 0, size);
                        }
                        else
                        {
                            break;
                        }
                    }
                }
            }
        }
        finally
        {
            if (streamWriter != null)
            {
                streamWriter.Close();
                streamWriter = null;
            }
            if (theEntry != null)
            {
                theEntry = null;
            }
            if (s != null)
            {
                s.Close();
                s = null;
            }
            GC.Collect();
            GC.Collect(1);
        }
    }
    #endregion
    #region 使用系统的WinRAR压缩、解压缩
    #region 私有变量
    String the_rar;
    RegistryKey the_Reg;
    Object the_Obj;
    String the_Info;
    ProcessStartInfo the_StartInfo;
    Process the_Process;
    #endregion
    /// <summary>
    /// 压缩
    /// </summary>
    /// <param name="zipname">要解压的文件名</param>
    /// <param name="zippath">要压缩的文件目录</param>
    /// <param name="dirpath">初始目录</param>
    public void EnZip(string zipname, string zippath, string dirpath)
    {
        try
        {
            the_Reg = Registry.ClassesRoot.OpenSubKey(@"Applications\WinRAR.exe\Shell\Open\Command");
            the_Obj = the_Reg.GetValue("");
            the_rar = the_Obj.ToString();
            the_Reg.Close();
            the_rar = the_rar.Substring(1, the_rar.Length - 7);
            the_Info = " a    " + zipname + "  " + zippath;
            the_StartInfo = new ProcessStartInfo();
            the_StartInfo.FileName = the_rar;
            the_StartInfo.Arguments = the_Info;
            the_StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
            the_StartInfo.WorkingDirectory = dirpath;
            the_Process = new Process();
            the_Process.StartInfo = the_StartInfo;
            the_Process.Start();
        }
        catch (Exception ex)
        {
            throw new Exception(ex.Message);
        }
    }
    /// <summary>
    /// 解压缩
    /// </summary>
    /// <param name="zipname">要解压的文件名</param>
    /// <param name="zippath">要解压的文件路径</param>
    public void DeZip(string zipname, string zippath)
    {
        try
        {
            the_Reg = Registry.ClassesRoot.OpenSubKey(@"Applications\WinRar.exe\Shell\Open\Command");
            the_Obj = the_Reg.GetValue("");
            the_rar = the_Obj.ToString();
            the_Reg.Close();
            the_rar = the_rar.Substring(1, the_rar.Length - 7);
            the_Info = " X " + zipname + " " + zippath;
            the_StartInfo = new ProcessStartInfo();
            the_StartInfo.FileName = the_rar;
            the_StartInfo.Arguments = the_Info;
            the_StartInfo.WindowStyle = ProcessWindowStyle.Hidden;
            the_Process = new Process();
            the_Process.StartInfo = the_StartInfo;
            the_Process.Start();
        }
        catch (Exception ex)
        {
            throw new Exception(ex.Message);
        }
    }
    #endregion
    #endregion
}

显示效果：

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